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Fossils
I'm an Old Man
Atomic
Time Divided
All Things That Remain
100
What is a trace fossil?
fossilize track and other evidence of an activity of other organisms. example: footprints
100
Eons, eras, periods, epoch
What are the four subdivisions of geologic time?
100
The time it takes for an unstable element to decay
What is half life
100
eons, eras, periods and epochs
What are the subdivisions of geologic time
100
Impressions form when sea shells or other hard parts of organisms fall into soft sediment such as mud.
How is a mold created?
200
a cast is a copy of a fossil. a mold is the impression of a fossil.
What is the difference between a cast and a mold?
200
Paleozoic era!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!;)and Mesozoic era
What era were the dinosaurs in?
200
When an unstable isotope breaks down into other isotopes and particles.
What is radioactive decay
200
The largest subdivision of geologic time
What is an eon
200
Shark
What is the descendent of Megladon?
300
widespread, relative short period of time, abundant.
What are the three qualifications of an index fossil?
300
every thing died
What happen at the Mesozoic period?
300
nitrogen14
What does carbon14 decay into?
300
Time units paleontologist divided the earth's history into.
What is the geologic time scale
300
Paleontology
What is the name of the category of Science that studies Fossils?
400
carbonized remains of a fossil.
What is carbon film?
400
The number of nucleons (protons and neutrons) in an atom's mass number.
What is an isotope
400
Archean, Proterozoic, Hadean
Name the eons in the Precambrian time
400
Carbon remains of an organism
What is Carbon Film
500
covered quickly, hard parts, and protection from predators, dead organism, time.
What are three factors necessary to make a fossil?
500
4 billion years
how long was the Precambrian time?
500
Measuring the ratio of parent isotope to daughter product.
What is radiometric dating?
500
65 million years ago
How long ago was the mass extinction of the dinosaurs.
500
Pangaea
What is the largest landmass in geologic history?